Brain Squeezer!

You are standing outside a closed door. On the other side of the door is a room that has three light bulbs in it. The room is completely sealed off from the outside. It has no windows and nothing can get in or out except through the door. On the outside of the room there are three light switches.  Each switch controls a different light bulb inside the room.

Your challenge is to work out which light switch controls which light bulb. You are allowed to enter the room only once, and when you come out, you must be able to say with 100% certainty which light switch controls which light bulb.

Brain Teaser Challenge

Hi Room 8.  Be the first Room 8 student to answer this brainteaser correctly online and win five Prize Draws!

You are on an island in the middle of a lake.  The lake is in a remote part of the country and there has never been a bridge connecting the island to the mainland.  Every day a tractor and wagon gives hay rides around the island.  Puzzled as to how the tractor had gotten onto the island, you ask around and find out that the tractor was not transported to the island by boat or by air.  Nor was it built on the island.

Explain how the tractor got there.